Anchor stud for abrasive wheels



R. JOCKEL- 2,351,129

ANCHOR STUD'FOR ABRASIVE WHEELS Filed Jan. 9. 19'43 Patented June 13,1944 2,351,129 AN CHOR STUD FOR ABRASIVE WHEELS Rudolph Jockel, Chicago,111., assignor to Titan a corporation of Illinois Abrasive Company,

Application January 9, 1943, Serial No. 471,908

6 Claims.

This invention relates to anchor studs for abrasive wheels and moreespecially to such a stud or fastening device adapted for attaching amolded abrasive wheel to a metal backing.

Among the features of my invention is the provision of means forfastening a stud to an abrasive wheel by strong and rugged attachmentand yet permit very slight flexibility or bending of the stud withoutloosening the attachment.

Other features and advantages of the invention will appear more fully asI proceed with the specification.

In those forms of devices embodying the features of my invention, shownin the accompanying drawing, Figure 1 is a fragmentary view of the backof an abrasive wheel with a portion of the backin broken away; Figure 2is a view taken as indicated b the line 2 of Figure 1; Figure 3 is aview similar to Figure 2 showing a modified form; Figure 4 is a viewtaken as indicated by the line 4 of Figure 3; Figure 5 is a view similarto Figure 3 showing another modifled form; and Figure 6 is a view takenas indicated by the line 6 of Figure 5.

As shown in the drawing, l0 ma indicate the metal backing for a moldedabrasive wheel H, for example, a wheel molded 0f granulated carborundumor other abrasive bonded by suitable cement such as Bakelite or resin,usually hardened by baking.

In order to attach the wheel H to the steel back II] it is customary toprovide the wheel with studs adapted to be inserted through holes in theback Hi. My invention relates particularly to the manner of fasteningsuch studs in the wheel itself.

In that form of device shown in Figure 2, a metal disk l2 with a flaringflange lZa is embedded in the wheel H, with a nut I3 under the disk,that is, inside of the flange l2a. The outer surface of the disk I2 ispreferably flush with the rear face Ila of the wheel. l4 indicates abolt extending through a hole in the back H! and threaded into the nutl3, such bolt, therefore, serving as a stud to hold the wheel to theback. The bolt I4 is provided with the usual head Ma.

The sheet metal disk 12 is preferably thin enough so that it has a veryslight flexibility. This will permit a certain amount of bendin ormisalignment of the bolt l4 with a consequent certain amount of rockingof the nut l3 in the wheel H without permitting the same to becomeentirely loosened. It will be seen that even though the disk portion l2of the member embedded in the wheel ll flexes or bends slightly, theflared flange l2a will always retain a firm anchorage in the wheel IIand thus prevent removal of the head Hi from the wheel even though suchnut becomes slightly loosened in the wheel material. The diameter of theflange lZa is enough larger than the diameter of the nut I3 so that anyloosening or rocking of the nut I3 in the wheel II with consequentloosening of the wheel material about the nut l3 will not affect thewheel material which anchors the flange Hat.

The construction shown in Figure 3 is substantially the same as thatshown in Figure 2 except that a stud H4 is employed instead of a boltl4. In this case the head H3 on the stud H4 serves the same purpose asthe nut [3 in the other device. In the device of Figure 2 the nut l3serves as a head for the bolt or stud l4. Here the disk H2 with theflaring flange ll2a corresponds to the disk 12 with the flaring flangel2a.

The device shown in Figures 5 and 6 is substantially the same as thatshown in Figure 2, the disk 2l2 with the flaring flange 2l2acorresponding to the disk l2 with the flaring flange I2a; but as hereshown the flange l2a is corrugated as indicated by 2I2b (see Figure 6)in order to give a better anchorage in the wheel material.

While I have shown and described certain embodiments of my invention, itis to be understood that it is capable of many modifications. Changes,therefore, in the construction and arrangement may be made withoutdeparting from the spirit and scope of the invention as disclosed in theappended claims, in which it is my intention to claim all noveltyinherent in my invention as broadly as permissible, in view of the priorart.

What I claim as new and desire to secure by Letters Patent is:

1. In combination with a cast abrasive wheel, a perforated sheet metalcup with its flared flange embedded in said wheel, and a stud projectingfrom said wheel through said perforation, said stud having a head withinthe cup embedded in the wheel.

2. In combination with a cast abrasive wheel, a perforated sheet metalcup with its flared flange embedded in said wheel, said cup lyinsubstantiall flush with the rear face of the wheel, and a studprojecting from said wheel through said perforation, said stud having ahead within the cup embedded in the wheel.

3. In combination with a cast abrasive wheel,

a perforated flexible sheet metal cup with its flared flange embedded insaid wheel, and a stud projecting from said wheel through saidperforathrough said perforation, said stud having a head tion, said studhaving a head within the cup emwithin the cup embedded in the wheel.

bedded in the wheel. 5. A device as claimed in claim 1, in which the 4.In combination with a cast abrasive wheel, flange of the cup iscorrugated.

a perforated flexible sheet metal cup with its 5 6. A device as claimedin claim 2, in which the flared flange embedded in said wheel, said cupflange of the cup is corrugated.

lying substantially flush with the rear face of the wheel, and a studprojecting from said wheel RUDOLPH JOCKEL.

